Question 1

Cell division, the climax of the cell cycle, consists of

Accepted Answer

A) chromosome replication and separation. 
B) the breakup of the nucleus at the metaphase plate. 
C) cytokinesis plus mitosis or meiosis. 
D) the formation of a new karyotype. 
A) chromosome replication and separation. 
B) the breakup of the nucleus at the metaphase plate. 
C) cytokinesis plus mitosis or meiosis. 
D) the formation of a new karyotype.

Question 2

The G₀ phase of the cell cycle is distinguished by

Accepted Answer

A) an active preparation for DNA synthesis. 
B) a doubling of chromosomes. 
C) an absence of preparation for DNA synthesis. 
D) the appearance of a metaphase plate. 
A) an active preparation for DNA synthesis. 
B) a doubling of chromosomes. 
C) an absence of preparation for DNA synthesis. 
D) the appearance of a metaphase plate.

Question 3

The parthenogenetic whiptail lizards have maintained their population levels primarily because they live in an extremely stable environment, a situation that minimizes the value of genetic diversity within a population.

Accepted Answer

A) True 
 B)False

Question 4

After a single cell undergoes meiosis, how many new cells will be produced?

Accepted Answer

A) 2 
B) 4 
C) 12 
D) 16 
A) 2 
B) 4 
C) 12 
D) 16

Question 5

The fact that DNA is distributed into homologous pairs allows

Accepted Answer

A) cells to reduce their chromosome number by half during meiosis. 
B) a cell to begin meiosis with only half of its DNA. 
C) sex chromosomes to exist in some cells. 
D) microtubules to attach to only half of the chromosomes. 
A) cells to reduce their chromosome number by half during meiosis. 
B) a cell to begin meiosis with only half of its DNA. 
C) sex chromosomes to exist in some cells. 
D) microtubules to attach to only half of the chromosomes.

Question 6

Some daughter cells are described as clones; for this description to be appropriate, the daughter cells must

Accepted Answer

A) show the same differentiation characteristics as the parent cell. 
B) separate from one another and experience an independent existence. 
C) contain a set of DNA that is identical to that of the parent cell. 
D) have been produced by meiotic cell division. 
A) show the same differentiation characteristics as the parent cell. 
B) separate from one another and experience an independent existence. 
C) contain a set of DNA that is identical to that of the parent cell. 
D) have been produced by meiotic cell division.

Question 7

Plants perform cytokinesis differently than animals because

Accepted Answer

A) plant cytokinesis takes place during interphase, but animal cytokinesis takes place in cell division. 
B) plant chromosomes are more difficult to separate than animal chromosomes. 
C) the rigid cell wall of the plant cell prevents the plasma membrane from pinching inward like it does in animal cells. 
D) the centrosomes of plants do not replicate prior to cell division. 
A) plant cytokinesis takes place during interphase, but animal cytokinesis takes place in cell division. 
B) plant chromosomes are more difficult to separate than animal chromosomes. 
C) the rigid cell wall of the plant cell prevents the plasma membrane from pinching inward like it does in animal cells. 
D) the centrosomes of plants do not replicate prior to cell division.

Question 8

DNA molecules are both exceptionally long (6 feet in humans)and exceptionally thin; to minimize breakage yet facilitate transcription, the DNA is wrapped around ____________________ to form a complex know as chromatin.

Accepted Answer

The answer of DNA molecules are both exceptionally long (6...

Question 9

Only meiosis could lead to the production of new

Accepted Answer

A) skin cells. 
B) brain cells. 
C) sperm cells. 
D) liver cells. 
A) skin cells. 
B) brain cells. 
C) sperm cells. 
D) liver cells.

Question 10

At the end of telophase the cell is ready for physical division into two cells, a process called ____________________.

Accepted Answer

The answer of At the end of telophase the cell...

Question 11

Lily plants sometimes have twice as many chromosomes per cell as their parent plants had. Which of the following explains how this might have happened?

Accepted Answer

A) The lily's sister chromatids failed to separate during meiosis. 
B) The chromosome number of the lily went from 2n to 1n. 
C) The lily gametes fused during mitosis. 
D) The parent plant lost half of its chromosomes during mitosis. 
A) The lily's sister chromatids failed to separate during meiosis. 
B) The chromosome number of the lily went from 2n to 1n. 
C) The lily gametes fused during mitosis. 
D) The parent plant lost half of its chromosomes during mitosis.

Question 12

The goal of mitosis is to

Accepted Answer

A) form two equal daughter nuclei. 
B) form chromatin strands. 
C) loop chromatin into chromosomes. 
D) package chromosomes into chromatin. 
A) form two equal daughter nuclei. 
B) form chromatin strands. 
C) loop chromatin into chromosomes. 
D) package chromosomes into chromatin.

Question 13

Meiosis I is called a reduction division because the

Accepted Answer

A) need for mitosis is reduced. 
B) time it takes for the cell to divide is reduced. 
C) chromosome number goes from diploid to haploid. 
D) cell size is reduced. 
A) need for mitosis is reduced. 
B) time it takes for the cell to divide is reduced. 
C) chromosome number goes from diploid to haploid. 
D) cell size is reduced.

Question 14

During anaphase I of meiosis,

Accepted Answer

A) sister chromatids are pulled apart toward opposite poles. 
B) each member of a bivalent moves toward a different pole. 
C) all bivalents are pulled to the same pole. 
D) paired homologues become attached to each other by microtubules. 
A) sister chromatids are pulled apart toward opposite poles. 
B) each member of a bivalent moves toward a different pole. 
C) all bivalents are pulled to the same pole. 
D) paired homologues become attached to each other by microtubules.

Question 15

Which set of symbols represents the stages of interphase?

Accepted Answer

A) G0, G1, and G2 
B) S1, S2, and G0 
C) G0, G1, and S 
D) S, G1, and G2 
A) G0, G1, and G2 
B) S1, S2, and G0 
C) G0, G1, and S 
D) S, G1, and G2

Question 16

The sequence of events in meiosis II is prophase II, ____________________, anaphase II, and telophase II, then cytokinesis.

Accepted Answer

The answer of The sequence of events in meiosis II...

Question 17

When examining the rapidly dividing cells of a fish embryo, you notice a cell that seems to contain two nuclei. The middle of the cell is pinched inward. This cell must be in _____ of mitosis.

Accepted Answer

A) prophase 
B) telophase 
C) metaphase 
D) anaphase 
A) prophase 
B) telophase 
C) metaphase 
D) anaphase

Question 18

When appropriately prompted, diploid individuals of Ulva prolifera form spores that germinate to become haploid individuals. How might diploid individuals be created to complete the life cycle?

Accepted Answer

A) Haploid individuals meiotically produce egg and sperm cells, which subsequently fuse. 
B) Some haploid individuals experience mitosis without cytokinesis followed by nuclear fusion. 
C) Some individuals differentiate to become haploid gametes and then fuse to produce a diploid zygote. 
D) Haploid individuals experience two sequential S phases in their cell cycle to reestablish the diploid state. 
A) Haploid individuals meiotically produce egg and sperm cells, which subsequently fuse. 
B) Some haploid individuals experience mitosis without cytokinesis followed by nuclear fusion. 
C) Some individuals differentiate to become haploid gametes and then fuse to produce a diploid zygote. 
D) Haploid individuals experience two sequential S phases in their cell cycle to reestablish the diploid state.

Question 19

During the S phase, the cell

Accepted Answer

A) duplicates its DNA. 
B) grows in size to prepare for DNA synthesis. 
C) completes its preparation for mitosis. 
D) rests between divisions. 
A) duplicates its DNA. 
B) grows in size to prepare for DNA synthesis. 
C) completes its preparation for mitosis. 
D) rests between divisions.

Question 20

The mitotic spindle guides the movement of chromosomes during certain stages of mitosis.

Accepted Answer

A) True 
 B)False

Exam 10: Cell Division

Cell division, the climax of the cell cycle, consists of

The G₀ phase of the cell cycle is distinguished by

The parthenogenetic whiptail lizards have maintained their population levels primarily because they live in an extremely stable environment, a situation that minimizes the value of genetic diversity within a population.

After a single cell undergoes meiosis, how many new cells will be produced?

The fact that DNA is distributed into homologous pairs allows

Some daughter cells are described as clones; for this description to be appropriate, the daughter cells must

Plants perform cytokinesis differently than animals because

DNA molecules are both exceptionally long (6 feet in humans)and exceptionally thin; to minimize breakage yet facilitate transcription, the DNA is wrapped around ____________________ to form a complex know as chromatin.

Only meiosis could lead to the production of new

At the end of telophase the cell is ready for physical division into two cells, a process called ____________________.

Lily plants sometimes have twice as many chromosomes per cell as their parent plants had. Which of the following explains how this might have happened?

The goal of mitosis is to

Meiosis I is called a reduction division because the

During anaphase I of meiosis,

Which set of symbols represents the stages of interphase?

The sequence of events in meiosis II is prophase II, ____________________, anaphase II, and telophase II, then cytokinesis.

When examining the rapidly dividing cells of a fish embryo, you notice a cell that seems to contain two nuclei. The middle of the cell is pinched inward. This cell must be in _____ of mitosis.

When appropriately prompted, diploid individuals of Ulva prolifera form spores that germinate to become haploid individuals. How might diploid individuals be created to complete the life cycle?

During the S phase, the cell

The mitotic spindle guides the movement of chromosomes during certain stages of mitosis.

The Nature of Science and the Characteristics of Life

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Energy, Metabolism, and Enzymes

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Patterns of Inheritance

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From Gene to Protein

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How Evolution Works

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The Biosphere

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Animal Hormones

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Skeletons, Muscles, and Movement

Defenses Against Disease

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Animal Behavior

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